Abu Kamil Shuja ibn Aslam ibn Muhammad ibn Shuja

Born: about 850
in (possibly) Egypt
Died: about 930

Abu Kamil Shuja is sometimes known as al'Hasib and he worked on integer solutions of equations. He also gave the solution of a fourth degree equation and of a quadratic equation with irrational coefficients.

Abu Kamil's work was the basis of Fibonacci's books. He lived later than al'Khwarizmi and his biggest advance was in the use of irrational coefficients.